Hi all, first post but avid reader. I just purchased this Marni sweater -- https://www.barneys.com/marni-crewneck-sweater-503949699.html. I'm wondering why they use the composition of 67% mohair and 25% nylon, 5% wool? Also, how will this fabric structure fare in colder sub 5-10C//40-50F weather? Many thanks, and grateful to be able to learn from you guys.